Some players utilize Rock Paper Scissors to test timing and psychology-- do you go initially, mirror moves

https://rock-paper-scissors-gambling-game-c-p-p-s8-433.birchreport.com/posts/five-rock-paper-scissors-lessons-from-the-pros

Some players utilize Rock Paper Scissors to check timing and psychology-- do you go first, mirror moves, or suddenly switch methods to confuse them?